Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a liquid crystal display module and a liquid crystal dimming module, the liquid crystal dimming module is located on the light emitting side of the liquid crystal display module, and dimming sub-pixels on the liquid crystal dimming module and display sub-pixels on the liquid crystal display module are arranged in a one-to-one correspondence mode so that finer partition dimming can be achieved; the contrast of a liquid crystal display surface is improved; meanwhile, the dimming sub-pixels of the liquid crystal dimming module adopt a passive driving mode, the number of photomasks and the number of manufacturing procedures can be reduced, and therefore the cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the development of display technology, people's dependence on the exchange and transmission of information is increasing day by day, and the application of low-power, high-contrast liquid crystal displays (LCD) will gradually increase.

[0003] Local dimming technology refers to dividing the backlight into multiple zones and independently controlling the backlight brightness of different zones to improve the contrast of the LCD display. However, due to the size of the light emitting diode (LED) in the backlight source and the complex drive circuit design, the existing local dimming technology has the problem of high cost and difficulty in commercial application. Summary of the invention

[0004] The present application provides a display panel and a display device to improve the contrast of a liquid crystal display while reducing the cost.

[0005] To solve the above problems, the technical solutions provided by this application are as follows:

[0006] An embodiment of the present application provides a display panel, comprising:

[0007] A liquid crystal display module, the liquid crystal display module comprising a plurality of display sub-pixels arranged in an array, wherein the plurality of display sub-pixels are arranged in sub-pixel rows in a first direction and in sub-pixel columns in a second direction, wherein the second direction is different from the first direction;

[0008] A liquid crystal dimming module is arranged on the light-emitting side of the liquid crystal display module, and the liquid crystal dimming module includes a plurality of dimming sub-pixels arranged in an array, and the dimming sub-pixels are arranged in a one-to-one correspondence with the display sub-pixels;

[0009] The driving mode of the display sub-pixel is different from the driving mode of the dimming sub-pixel. The driving mode of the display sub-pixel is set to active driving, and the driving mode of the dimming sub-pixel is set to passive driving.

[0010] In the display panel provided in the embodiment of the present application, the dimming sub-pixel includes a first electrode, and the liquid crystal dimming module includes:

[0011] A first substrate, comprising a first substrate and a plurality of first electrodes arranged in an array on the first substrate, each of the first electrodes being arranged corresponding to one of the dimming sub-pixels;

[0012] A second substrate, arranged opposite to the first substrate, the second substrate is located on a side of the first electrode away from the first substrate, and the second substrate comprises a second substrate and a second electrode arranged on a side of the second substrate facing the first electrode;

[0013] A first liquid crystal layer is disposed between the first electrode and the second electrode, wherein the first liquid crystal layer includes first liquid crystal molecules;

[0014] The first substrate further includes a plurality of control signal wirings disposed between the first substrate and the first electrode, and each of the control signal wirings is electrically connected to one of the first electrodes.

[0015] In the display panel provided in the embodiment of the present application, each of the first electrodes includes at least one first sub-electrode and at least one second sub-electrode, and the first sub-electrode and the second sub-electrode are spaced apart in the first direction; the control signal routing includes a first sub-signal routing and a second sub-signal routing, the first sub-signal routing is electrically connected to the first sub-electrode, the second sub-signal routing is electrically connected to the second sub-electrode, and the first sub-signal routing and the second sub-signal routing are insulated.

[0016] In the display panel provided in the embodiment of the present application, the first sub-electrode includes multiple dimming domains, the deflection angles of the first liquid crystal molecules corresponding to different dimming domains are different, and the number of dimming domains of the first sub-electrode is greater than the number of dimming domains of the second sub-electrode.

[0017] In the display panel provided in the embodiment of the present application, the number of the first sub-electrodes is greater than the number of the second sub-electrodes, and the second sub-electrode is located between two adjacent first sub-electrodes; the first sub-signal routing and the second sub-signal routing are spaced apart in a second direction, and the second direction is different from the first direction. In the same dimming sub-pixel, the first sub-electrode and the second sub-electrode are both located between the first sub-signal routing and the second sub-signal routing.

[0018] In the display panel provided in the embodiment of the present application, the number of the first sub-electrodes is 2, the number of the second sub-electrodes is 1, the two first sub-electrodes are symmetrically arranged with respect to the second sub-electrode, the first sub-electrode includes two dimming domains, and the second sub-electrode includes one dimming domain;

[0019] The liquid crystal dimming module further includes a first supporting column, and the first supporting column is arranged on a side of the second sub-electrode close to the second electrode.

[0020] In the display panel provided in the embodiment of the present application, the first sub-electrode is provided with a plurality of slits in each of the dimming domains, and the slits in two adjacent dimming domains extend in different directions.

[0021] In the display panel provided in the embodiment of the present application, the liquid crystal display module includes:

[0022] A third substrate is arranged on a side of the second substrate away from the first substrate, the third substrate comprises a third substrate and a plurality of transistors and a third electrode arranged on the third substrate, each of the display sub-pixels comprises at least one transistor and one third electrode, and the third electrode is connected to the transistor;

[0023] a fourth substrate, disposed on a side of the third substrate away from the second substrate, the fourth substrate comprising a fourth substrate and a fourth electrode disposed on the fourth substrate facing the third electrode;

[0024] A second liquid crystal layer is disposed between the third substrate and the fourth substrate;

[0025] The color filter layer is disposed on the third substrate or the fourth substrate.

[0026] In the display panel provided in the embodiment of the present application, the third substrate is reused as the second substrate.

[0027] The present application also provides a display device, which includes:

[0028] Backlight module;

[0029] In the display panel of one of the aforementioned embodiments, the display panel and the backlight module are arranged opposite to each other, and the liquid crystal dimming module is located on a side of the liquid crystal display module away from the backlight module.

[0030] The beneficial effects of the present application are as follows: in the display panel and display device provided by the present application, the display panel includes a liquid crystal display module and a liquid crystal dimming module, the liquid crystal dimming module is located on the light-emitting side of the liquid crystal display module, and the dimming sub-pixels on the liquid crystal dimming module are arranged in a one-to-one correspondence with the display sub-pixels on the liquid crystal display module to achieve more precise zone dimming and improve the contrast of the liquid crystal display surface; at the same time, the dimming sub-pixels of the liquid crystal dimming module adopt a passive driving method, which can reduce the number of masks and processes, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the relative positions of various structures on a display device provided in an embodiment of the present application.

[0033] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the relative display sub-pixel and dimming sub-pixel.

[0034] Figure 3 for Figure 2 A schematic diagram of a planar structure of the first electrode.

[0035] Figure 4 for Figure 2 Detailed structural diagram of the third substrate.

[0036] Figure 5 for Figure 1 Another cross-sectional structural schematic diagram of the relative display sub-pixel and dimming sub-pixel in FIG. DETAILED DESCRIPTION

[0037] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented in. The directional terms mentioned in the present application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the figures, units with similar structures are represented by the same reference numerals. In the accompanying drawings, the thickness of some layers and regions is exaggerated for clear understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited to this.

[0038] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of the relative positions of various structures on a display device provided in an embodiment of the present application, Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the relative display sub-pixel and dimming sub-pixel in FIG. Figure 3 for Figure 2 A schematic diagram of a planar structure of the first electrode, Figure 4 for Figure 2 Detailed structural diagram of the third substrate. Figure 1The display device 100 includes a backlight module 10 and a display panel 2 arranged opposite to the backlight module 10. Exemplarily, the display device 100 can be a device with a display screen, such as a television, a mobile phone, a tablet computer, a computer monitor, a gaming device, a digital camera, a car navigation system, an ATM, a wearable device, etc.

[0039] The display panel 2 includes a liquid crystal display module 20 and a liquid crystal dimming module 30 which are arranged on the light-emitting side of the backlight module 10. The liquid crystal dimming module 30 is arranged between the liquid crystal display module 20 and the backlight module 10. That is, the liquid crystal dimming module 30 is located on a side of the liquid crystal display module 20 away from the backlight module 10, in other words, the liquid crystal dimming module 30 is located on the light-emitting side of the liquid crystal display module 20.

[0040] The liquid crystal display module 20 is used to display images, and the light emitting side of the liquid crystal display module 20 is the side of the liquid crystal display module 20 displaying images. The backlight module 10 is used to provide backlight to the liquid crystal display module 20, and the liquid crystal dimming module 30 is used to partition the backlight of the backlight module 10 and provide the partitioned backlight to the liquid crystal display module 20 to improve the contrast of the liquid crystal display module 20. The light source of the backlight module 10 can be side-entry type or direct-down type. Taking the direct-down type as an example, the backlight module 10 includes a back plate and optical structures such as a light plate, a reflector, a diffuser, and a prism sheet arranged in the accommodating cavity of the back plate.

[0041] The liquid crystal display module 20 includes a plurality of display sub-pixels SP1 arranged in an array, wherein the plurality of display sub-pixels SP1 are arranged into sub-pixel rows in a first direction X, and the plurality of display sub-pixels SP1 are arranged into sub-pixel columns in a second direction Y, and each of three adjacent display sub-pixels SP1 can constitute a pixel, and the three display sub-pixels SP1 in each pixel can display different colors to realize color display of the pixel, for example, the three display sub-pixels SP1 in each pixel can display red, green and blue, respectively. The first direction X and the second direction Y are different, for example, the first direction X and the second direction Y are perpendicular, and of course, the present application is not limited thereto, and the first direction X and the second direction Y in the present application can also intersect to form an angle of other angles.

[0042] The liquid crystal dimming module 30 includes a plurality of dimming sub-pixels SP2 arranged in an array, and the dimming sub-pixels SP2 are arranged in a one-to-one correspondence with the display sub-pixels SP1. That is, the plurality of dimming sub-pixels SP2 are arranged in a sub-pixel row in the first direction X, and the plurality of dimming sub-pixels SP2 are arranged in a sub-pixel column in the second direction Y, and each of the dimming sub-pixels SP2 is arranged in a corresponding manner with one of the display sub-pixels SP1. The dimming sub-pixels SP2 control whether the backlight of the backlight module 10 passes through or not, so as to provide backlight to the corresponding display sub-pixel SP1. For example, when the display sub-pixel SP1 needs to be lit, the dimming sub-pixel SP2 corresponding to the display sub-pixel SP1 allows the backlight of the backlight module 10 to pass through, and provides backlight to the display sub-pixel SP1; when the display sub-pixel SP1 does not need to be lit, the dimming sub-pixel SP2 corresponding to the display sub-pixel SP1 blocks the backlight of the backlight module 10, so that the black screen displayed by the display sub-pixel SP1 becomes darker. In this way, the backlight can be partitioned at the pixel level, making the backlight partitioning finer and thus improving the contrast.

[0043] The driving mode of the display sub-pixel SP1 is different from the driving mode of the dimming sub-pixel SP2. The driving mode of the display sub-pixel SP1 is set to active driving, and the driving mode of the dimming sub-pixel SP2 is set to passive driving. It should be noted that active driving refers to active matrix driving, which controls the display of each sub-pixel by setting an active element, such as a thin film transistor 212, on each sub-pixel point in the display matrix; passive driving refers to passive matrix driving, which directly controls the display of sub-pixel points by controlling signal routing, and does not need to set an active element on each sub-pixel point. The structure is relatively simple, thereby reducing the number of masks and processes and reducing costs.

[0044] In this embodiment, by setting the liquid crystal dimming module 30 between the liquid crystal display module 20 and the backlight module 10, the dimming sub-pixels SP2 on the liquid crystal dimming module 30 are set in one-to-one correspondence with the display sub-pixels SP1 on the liquid crystal display module 20, and the backlight can be partitioned at the pixel level, making the backlight partition more refined, thereby improving the contrast. At the same time, the dimming sub-pixels SP2 adopt a passive driving method, which can reduce the number of masks and processes, thereby improving the contrast and reducing the cost.

[0045] The specific structures of the liquid crystal display module 20 and the liquid crystal dimming module 30 are described in detail below by taking a corresponding display sub-pixel SP1 and a dimming sub-pixel SP2 as an example.

[0046] Reference Figure 2 , Figure 2The schematic diagram of the film layer structure of a display sub-pixel SP1 and a dimming sub-pixel SP2 correspondingly arranged on the liquid crystal display module 20 and the liquid crystal dimming module 30 is schematically shown, but the structure of the display sub-pixel SP1 and the dimming sub-pixel SP2 in the present application is not limited thereto. The dimming sub-pixel SP2 includes a first electrode 312. The liquid crystal dimming module 30 includes a first substrate 31 and a second substrate 32 arranged opposite to each other and a first liquid crystal layer 33 arranged between the first substrate 31 and the second substrate 32. The second substrate 32 is located on a side of the first substrate 31 away from the backlight module 10.

[0047] The first substrate 31 includes a first substrate 311 and a plurality of first electrodes 312 arranged in an array on the first substrate 311, and each of the first electrodes 312 is arranged corresponding to one of the dimming sub-pixels SP2. The first substrate 31 also includes a plurality of control signal wires 313 arranged between the first substrate 311 and the first electrodes 312, and each of the control signal wires 313 is electrically connected to one of the first electrodes 312, and is used to provide an electrical signal to the first electrode 312, so as to realize passive driving of the dimming sub-pixel SP2.

[0048] The second substrate 32 is arranged opposite to the first substrate 31, and the second substrate 32 is located on the side of the first electrode 312 away from the first substrate 311. The second substrate 32 includes a second substrate 321 and a second electrode 322 arranged on the side of the second substrate 321 facing the first electrode 312. After the second electrode 322 and the first electrode 312 are connected to an electrical signal, an electric field is formed between the second electrode 322 and the first electrode 312. The materials of the second electrode 322 and the first electrode 312 can be the same, for example, both are transparent conductive materials such as indium tin oxide (ITO).

[0049] Optionally, the second substrate 321 and the first substrate 311 are made of the same material, for example, the second substrate 321 and the first substrate 311 may be rigid substrates or flexible substrates; when the second substrate 321 and the first substrate 311 are rigid substrates, they may include rigid transparent substrates such as glass substrates, quartz substrates or silicon wafers; when the second substrate 321 and the first substrate 311 are flexible substrates, they may include flexible transparent substrates such as polyimide (PI) film, ultra-thin glass film, polyethylene terephthalate (PET), triacetyl cellulose (TAC), etc.

[0050] The first liquid crystal layer 33 is disposed between the first electrode 312 and the second electrode 322, and includes first liquid crystal molecules 331. The first liquid crystal molecules 331 are deflected under the action of the electric field between the first electrode 312 and the second electrode 322, and their arrangement state is changed to control the backlight transmittance of the backlight module 10.

[0051] The liquid crystal dimming module 30 further includes a first sealant 34 and a first support column 35 disposed between the first substrate 31 and the second substrate 32. The first sealant 34 surrounds the first liquid crystal layer 33. The first support column 35 is connected between the first electrode 312 and the second electrode 322 to control the liquid crystal box thickness of the liquid crystal dimming module 30.

[0052] Reference Figure 2 and Figure 3 The first substrate 31 further includes a first insulating layer 314, and the first insulating layer 314 is located between the control signal wiring 313 and the first electrode 312. A via is provided on the first insulating layer 314, and the first electrode 312 located in the via of the first insulating layer 314 contacts and is electrically connected to the control signal wiring 313. Optionally, the first insulating layer 314 may be silicon nitride (SiNx), silicon oxide (SiOx), or a stack of silicon nitride and silicon oxide.

[0053] In one embodiment, each of the first electrodes 312 includes at least one first sub-electrode 3121 and at least one second sub-electrode 3122, and the first sub-electrode 3121 and the second sub-electrode 3122 are arranged at intervals in the first direction X. The control signal wiring 313 includes a first sub-signal wiring 3131 and a second sub-signal wiring 3132, the first sub-signal wiring 3131 is electrically connected to the first sub-electrode 3121, and the second sub-signal wiring 3132 is electrically connected to the second sub-electrode 3122. The first insulating layer 314 is provided with a first via hole 3141 at a position corresponding to the first sub-signal wiring 3131, and a second via hole 3142 is provided at a position corresponding to the second sub-signal wiring 3132. Part of the first sub-electrode 3121 is located in the first via hole 3141, contacts with and is electrically connected to the first sub-signal wiring 3131, and part of the second sub-electrode 3122 is located in the second via hole 3142, contacts with and is electrically connected to the second sub-signal wiring 3132.

[0054] The first sub-signal wiring 3131 and the second sub-signal wiring 3132 are insulated, that is, the electrical signals on the first sub-signal wiring 3131 and the second sub-signal wiring 3132 are different, so that the first sub-electrode 3121 and the second sub-electrode 3122 can be controlled independently, and then the deflection angles of the first liquid crystal molecules 331 in the corresponding areas of the first sub-electrode 3121 and the second sub-electrode 3122 can be adjusted separately to control the transmittance.

[0055] In this way, when the liquid crystal display module 20 needs to display at a wide viewing angle, an electric signal is applied to both the first sub-electrode 3121 and the second sub-electrode 3122, so that light can pass through the areas corresponding to the first sub-electrode 3121 and the second sub-electrode 3122; when the liquid crystal display module 20 needs to display at a narrow viewing angle to achieve an anti-peeping function, an electric signal is applied to the second sub-electrode 3122, while no electric signal is applied to the first sub-electrode 3121, so that light can pass through the area corresponding to the second sub-electrode 3122, while no light can pass through the area corresponding to the first sub-electrode 3121.

[0056] Optionally, the first sub-electrode 3121 includes a plurality of dimming domains, and the deflection angles of the first liquid crystal molecules 331 corresponding to different dimming domains are different, so as to increase the light emission angle of the dimming sub-pixel SP2. The number of dimming domains of the first sub-electrode 3121 is greater than the number of dimming domains of the second sub-electrode 3122, so that the light emission angle of the area corresponding to the first sub-electrode 3121 is greater than the light emission angle of the area corresponding to the second sub-electrode 3122. In this way, when a wide viewing angle display is required, since the first sub-electrode 3121 includes a plurality of dimming domains, the light emission angle can be further increased, and the viewing angle can be increased; and when the anti-peeping function is required, since the number of dimming domains of the second sub-electrode 3122 is small, the light emission angle is small, and the light emission angle can be converged to reduce the viewing angle.

[0057] The first sub-electrode 3121 is provided with a plurality of slits 3120 in each dimming domain, and the slits 3120 in two adjacent dimming domains extend in different directions, for example, the slits 3120 in two adjacent dimming domains are symmetrically arranged. The slits 3120 are hollow structures on the first sub-electrode 3121. Specifically, the first sub-electrode 3121 may include a trunk electrode, a frame electrode, and a branch electrode. The trunk electrode extends along the first direction X, and the frame electrode surrounds the trunk electrode. The trunk electrode divides the first sub-electrode 3121 into a plurality of dimming domains. The branch electrodes are located in the dimming domains and are connected to the trunk electrode and the frame electrode. The gaps between the adjacent branch electrodes are the slits 3120. The angle between the slits 3120 and the first direction X is in the range of 0° to 45°, for example, 7°, etc., so as to better increase the light output angle of the corresponding area of ​​the first sub-electrode 3121.

[0058] The number of the first sub-electrodes 3121 is greater than the number of the second sub-electrodes 3122, and the second sub-electrode 3122 is located between two adjacent first sub-electrodes 3121. The first sub-signal routing 3131 and the second sub-signal routing 3132 are arranged at intervals in the second direction Y, and the first sub-electrode 3121 and the second sub-electrode 3122 are both located between the first sub-signal routing 3131 and the second sub-signal routing 3132. The first sub-electrode 3121 extends beyond the end of the second sub-electrode 3122 at one end close to the first sub-signal routing 3131, so as to be electrically connected to the first sub-signal routing; correspondingly, the second sub-electrode 3122 extends beyond the end of the first sub-electrode 3121 at one end close to the second sub-signal routing 3132, so as to be electrically connected to the second sub-signal routing.

[0059] In one embodiment, referring to Figure 3, the number of the first sub-electrodes 3121 is 2, the number of the second sub-electrodes 3122 is 1, the two first sub-electrodes 3121 are symmetrically arranged about the second sub-electrode 3122, the first sub-electrode 3121 includes two dimming domains, such as a first dimming domain DM1 and a second dimming domain DM2, the first dimming domain DM1 and the second dimming domain DM2 are symmetrically arranged about the midline P-P' of the first sub-electrode 3121. The second sub-electrode 3122 includes one dimming domain. By setting the second sub-electrode 3122 as a single domain, the light output angle of the corresponding area of ​​the second sub-electrode 3122 can be further reduced to achieve a better anti-peeping effect. In addition, since the second sub-electrode 3122 adopts a single domain design, the first support column 35 can be set on the side of the second sub-electrode 3122 close to the second electrode 322 to improve the stability of the first support column 35.

[0060] Continue to refer to Figure 2 The liquid crystal display module 20 includes a third substrate 21 and a fourth substrate 22 disposed opposite to each other and a second liquid crystal layer 23 disposed between the third substrate 21 and the fourth substrate 22. The fourth substrate 22 is located on a side of the third substrate 21 away from the backlight module 10.

[0061] The third substrate 21 is disposed on a side of the second substrate 32 away from the first substrate 31, and the third substrate 21 includes a third substrate 211 and a plurality of transistors 212 and a third electrode 213 disposed on the third substrate 211. Each display sub-pixel SP1 includes at least one transistor 212 and one third electrode 213, and the third electrode 213 is connected to the transistor 212. The transistor 212 is used to provide a driving signal to the third electrode 213 to realize active driving of the display sub-pixel SP1.

[0062] The fourth substrate 22 is disposed on a side of the third substrate 21 away from the second substrate 32, and the fourth substrate 22 includes a fourth substrate 221 and a fourth electrode 222 disposed on the fourth substrate 221 facing the third electrode 213. After the fourth electrode 222 and the third electrode 213 are connected to an electrical signal, an electric field is formed between the fourth electrode 222 and the third electrode 213. The fourth electrode 222 and the third electrode 213 may be made of the same material, such as transparent conductive materials such as indium tin oxide (ITO). Optionally, the fourth substrate 221 and the third substrate 211 are made of the same material, for example, the fourth substrate 221 and the third substrate 211 may be rigid substrates or flexible substrates; when the fourth substrate 221 and the third substrate 211 are rigid substrates, they may include rigid transparent substrates such as glass substrates, quartz substrates or silicon wafers; when the fourth substrate 221 and the third substrate 211 are flexible substrates, they may include flexible transparent substrates such as polyimide (PI) film, ultra-thin glass film, polyethylene terephthalate (PET), triacetyl cellulose (TAC), etc.

[0063] The second liquid crystal layer 23 is disposed between the third electrode 213 and the fourth electrode 222, and includes second liquid crystal molecules 231. The second liquid crystal molecules 231 are deflected under the action of the electric field between the third electrode 213 and the fourth electrode 222, and their arrangement states are changed to control the transmittance of the backlight after passing through the liquid crystal dimming module 30, so as to realize the display function.

[0064] Correspondingly, the liquid crystal display module 20 further includes a second sealant 24 and a second support column 25 disposed between the third substrate 21 and the fourth substrate 22. The second sealant 24 surrounds the second liquid crystal layer 23. The second support column 25 is connected between the third electrode 213 and the fourth electrode 222 to control the liquid crystal box thickness of the liquid crystal display module 20.

[0065] Of course, in order to realize the color display of the liquid crystal display module 20, the liquid crystal display module 20 further includes a color filter layer, and the color filter layer is arranged on the third substrate 21 or the fourth substrate 22. For example, when the color filter layer is arranged on the third substrate 21, the color filter layer can be located between the transistor 212 and the third electrode 213; when the color filter layer is arranged on the fourth substrate 22, the color filter layer can be located between the fourth electrode 222 and the fourth substrate 221. The color filter layer includes a plurality of color filter blocks, each of which corresponds to one of the display sub-pixels SP1. The plurality of color filter blocks may include a red color filter block, a green color filter block, and a blue color filter block. The display sub-pixel SP1 corresponding to the red color filter block can display red, the display sub-pixel SP1 corresponding to the green color filter block can display green, and the display sub-pixel SP1 corresponding to the blue color filter block can display blue, thereby realizing color display.

[0066] Optionally, refer to Figure 2 and Figure 4 The third substrate 21 further includes a fifth electrode 214 located between the transistor 212 and the third electrode 213. The fifth electrode 214 can provide an electrical signal to the liquid crystal display module 20, or form a horizontal electric field with the third electrode 213 to control the deflection of the second liquid crystal molecules 231. In this case, the fourth electrode 222 may not be required. The material of the fifth electrode 214 may be the same as that of the third electrode 213.

[0067] Reference Figure 4 The third substrate 21 further includes a light shielding electrode 215 provided corresponding to the transistor 212. The transistor 212 may be a thin film transistor 212. The transistor 212 includes an active layer 2121, a gate 2122, a gate insulating layer 2123, a source 2124 and a drain 2125. The light shielding electrode 215 is provided at least corresponding to the active layer 2121. The material of the light shielding electrode 215 includes metals with light shielding properties such as molybdenum and titanium.

[0068] Of course, the third substrate 21 further includes a plurality of insulating layers disposed between the light shielding electrode 215, the transistor 212, the fifth electrode 214, the third electrode 213 and other structures. For example, the plurality of insulating layers include a buffer layer 216, a first interlayer insulating layer 217, a passivation layer 218, a planarization layer 219 and a second interlayer insulating layer 220.

[0069] The buffer layer 216 covers the light shielding electrode 215 and the third substrate 211. The active layer 2121 is arranged on a side of the buffer layer 216 away from the third substrate 211, and the active layer 2121 includes a channel portion and a source contact portion and a drain contact portion located on opposite sides of the channel portion. The gate insulating layer 2123 and the gate 2122 are arranged on a side of the active layer 2121 away from the third substrate 211, and are arranged corresponding to the channel portion.

[0070] The first interlayer insulating layer 217 covers the gate 2122, a portion of the active layer 2121, and the buffer layer 216. The source 2124 and the drain 2125 are arranged on a side of the first interlayer insulating layer 217 away from the third substrate 211. The source 2124 and the drain 2125 are electrically connected to the source contact portion and the drain contact portion respectively through via holes on the first interlayer insulating layer 217. Optionally, the transistor 212 further includes an auxiliary electrode 2126 connected to the light shielding electrode 215, and the auxiliary electrode 2126 can be electrically connected to the drain 2125 of the transistor 212.

[0071] The passivation layer 218 covers the source electrode 2124, the drain electrode 2125 and the first interlayer insulating layer 217. The planarization layer 219 covers the passivation layer 218. The fifth electrode 214 is arranged on a side of the passivation layer 218 away from the third substrate 211. The second interlayer insulating layer 220 covers the fifth electrode 214 and the planarization layer 219. The third electrode 213 is arranged on a side of the second interlayer insulating layer 220 away from the third substrate 211, and is electrically connected to the drain electrode 2125 through a via hole of the second interlayer insulating layer 220.

[0072] In one embodiment, referring to Figures 1 to 5 , Figure 5 for Figure 1 Another cross-sectional structural diagram of the display sub-pixel SP1 and the dimming sub-pixel SP2 relative to each other. Figure 5 ,and Figure 2 The difference of the exemplary embodiment is that the third substrate 211 on the liquid crystal display module 20 is reused as the second substrate 321 on the liquid crystal dimming module 30, that is, the liquid crystal display module 20 and the liquid crystal dimming module share a substrate to reduce the number of substrates and further reduce costs. For other descriptions, please refer to the above embodiment and will not be repeated here.

[0073] According to the above embodiments, it can be seen that:

[0074] In a display panel and a display device provided by the present application, the display panel includes a liquid crystal display module and a liquid crystal dimming module. The liquid crystal dimming module is located on the light-emitting side of the liquid crystal display module. The dimming sub-pixels on the liquid crystal dimming module are arranged in a one-to-one correspondence with the display sub-pixels on the liquid crystal display module to achieve more precise zone dimming and improve the contrast of the liquid crystal display surface. At the same time, the dimming sub-pixels of the liquid crystal dimming module adopt a passive driving method, which can reduce the number of masks and processes, thereby reducing costs.

[0075] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0076] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: A liquid crystal display module, the liquid crystal display module comprising a plurality of display sub-pixels arranged in an array, wherein the plurality of display sub-pixels are arranged in sub-pixel rows in a first direction and in sub-pixel columns in a second direction, wherein the second direction is different from the first direction; A liquid crystal dimming module is arranged on the light-emitting side of the liquid crystal display module, and the liquid crystal dimming module includes a plurality of dimming sub-pixels arranged in an array, and the dimming sub-pixels are arranged in a one-to-one correspondence with the display sub-pixels; The driving mode of the display sub-pixel is different from the driving mode of the dimming sub-pixel. The driving mode of the display sub-pixel is set to active driving, and the driving mode of the dimming sub-pixel is set to passive driving.

2. The display panel according to claim 1, characterized in that: The dimming sub-pixel includes a first electrode, and the liquid crystal dimming module includes: A first substrate, comprising a first substrate and a plurality of first electrodes arranged in an array on the first substrate, each of the first electrodes being arranged corresponding to one of the dimming sub-pixels; A second substrate, arranged opposite to the first substrate, the second substrate is located on a side of the first electrode away from the first substrate, and the second substrate comprises a second substrate and a second electrode arranged on a side of the second substrate facing the first electrode; A first liquid crystal layer is disposed between the first electrode and the second electrode, wherein the first liquid crystal layer includes first liquid crystal molecules; The first substrate further includes a plurality of control signal wirings disposed between the first substrate and the first electrode, and each of the control signal wirings is electrically connected to one of the first electrodes.

3. The display panel according to claim 2, characterized in that: Each of the first electrodes includes at least one first sub-electrode and at least one second sub-electrode, and the first sub-electrodes and the second sub-electrodes are arranged at intervals in the first direction; The control signal routing includes a first sub-signal routing and a second sub-signal routing, the first sub-signal routing is electrically connected to the first sub-electrode, the second sub-signal routing is electrically connected to the second sub-electrode, and the first sub-signal routing and the second sub-signal routing are insulated.

4. The display panel according to claim 3, characterized in that: The first sub-electrode includes a plurality of dimming domains, and the deflection angles of the first liquid crystal molecules corresponding to different dimming domains are different. The number of dimming domains of the first sub-electrode is greater than the number of dimming domains of the second sub-electrode.

5. The display panel according to claim 4, characterized in that: The first sub-electrode is provided with a plurality of slits in each of the light-adjusting domains, and the slits in two adjacent light-adjusting domains extend in different directions.

6. The display panel according to claim 4, characterized in that: The number of the first sub-electrodes is greater than the number of the second sub-electrodes, and the second sub-electrodes are located between two adjacent first sub-electrodes; the first sub-signal routing and the second sub-signal routing are spaced apart in the second direction, and in the same dimming sub-pixel, the first sub-electrode and the second sub-electrode are both located between the first sub-signal routing and the second sub-signal routing.

7. The display panel according to claim 6, characterized in that: The number of the first sub-electrodes is 2, the number of the second sub-electrodes is 1, the two first sub-electrodes are symmetrically arranged with respect to the second sub-electrode, the first sub-electrode includes two dimming domains, and the second sub-electrode includes one dimming domain; The liquid crystal dimming module further includes a first supporting column, and the first supporting column is arranged on a side of the second sub-electrode close to the second electrode.

8. The display panel according to any one of claims 2 to 7, characterized in that: The liquid crystal display module comprises: A third substrate is arranged on a side of the second substrate away from the first substrate, the third substrate comprises a third substrate and a plurality of transistors and a third electrode arranged on the third substrate, each of the display sub-pixels comprises at least one transistor and one third electrode, and the third electrode is connected to the transistor; a fourth substrate, disposed on a side of the third substrate away from the second substrate, the fourth substrate comprising a fourth substrate and a fourth electrode disposed on the fourth substrate facing the third electrode; A second liquid crystal layer is disposed between the third substrate and the fourth substrate; The color filter layer is disposed on the third substrate or the fourth substrate.

9. The display panel according to claim 8, characterized in that: The third substrate is reused as the second substrate.

10. A display device, characterized in that: include: Backlight module; The display panel according to any one of claims 1 to 9, wherein the display panel and the backlight module are arranged opposite to each other, and the liquid crystal dimming module is located on a side of the liquid crystal display module away from the backlight module.

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